Lock



FIG. 1 is a perspective view of the design of the present invention;

FIG. 2 is a front view of the lock shown in FIG. 1;

FIG. 3 is a top view of the lock shown in FIG. 1;

FIG. 4 is a back view of the lock shown in FIG. 1;

FIG. 5 is a bottom view of the lock shown in FIG. 1;

FIG. 6 is a side view of the lock shown in FIG. 1; and,

FIG. 7 is a side view of the lock shown in FIG. 1.

The portions of the Figures shown in phantom lines are not part of the claimed design but are for illustration only. The broken lines, which define the bounds of the claimed design, form no part thereof. 

The ornamental design for a lock, as shown and described. 